Best Home Addition Contractors in Portland (2024)

Our annual ranking of top construction firms highlights the top companies in Portland based on their project volume over the past year, with a focus on relevance. This compilation is derived from permit and contractor information sourced from city, county, and state building departments through our partners at BuildZoom. For further information regarding data accuracy, please consult the note at the end of this article.

Construction data has broad applications across the industry, serving various professionals. Suppliers and service providers can use construction market trends to strategically approach general contractors by aligning their outreach with major project milestones, such as new permits and critical stages, ensuring their offerings meet contractors’ immediate needs. Similarly, subcontractors benefit by focusing their efforts on general contractors experiencing growth, often indicated by patterns in construction activity. For developers, property owners, and investors, contractor licenses and construction history data help validate the experience and quality of contractors, making it easier to choose reliable partners for their projects.

Ziebart Construction

Address:
15822 SW. Upper Boones Ferry Rd., Lake Oswego, OR 97035

Ziebart Construction is a family-owned boutique remodeling firm based in Portland, Oregon, with a rich history spanning three generations. Specializing in mid-range price point home improvement services, Ziebart Construction is dedicated to helping homeowners transform their spaces with beautiful, functional designs. The company excels in kitchen, bathroom, basement, and home addition remodeling, offering luxury-quality services at an affordable price. Ziebart Construction sets itself apart through its unique business model, including the ownership of a cabinet company that produces furniture-quality wood cabinets at a fraction of typical market prices, making high-end designs accessible to a broader range of clients. The team prides itself on delivering a seamless remodeling experience, marked by transparent communication, integrity, and attention to detail at every stage, from design to installation and beyond. Ziebart Construction’s core values—craftsmanship, quality, integrity, family, faith, and fun—are the foundation of their work ethic, fostering an environment where clients feel like family. With a commitment to outstanding customer service and a clear focus on making every project an enjoyable experience, Ziebart has earned a strong reputation among Pacific Northwest homeowners. As a proud member of the Oregon Remodelers Association, National Kitchen & Bath Association, and the National Association of the Remodeling Industry, Ziebart Construction continues to be a trusted name in the remodeling industry for homeowners seeking beautiful and functional spaces that truly feel like home.

The Portland Bureau of Development Services provided data for the Home Builder Digest team, which highlighted Ziebart Construction’s work in 2023. Among the projects were a $228,000 addition and a $200,000 new detached ADU, both significant achievements for the company that year.

Mooney Construction & Development LLC

Address:
3439 NE. Sandy Blvd., Portland, OR 97232

Founded in 1996, Mooney Construction and Development, LLC is a premier residential construction company based in Portland, Oregon. With a focus on custom home remodeling, new home construction, and aging-in-place renovations, the company is led by owner Joe Mooney, whose expertise and dedication have shaped the business for nearly three decades. Joe’s background in construction management, beginning in Chicago, provided him with the foundation to specialize in restoring historic homes, a passion he brought with him when he moved to Portland. Over the years, Mooney Construction and Development has successfully completed a variety of projects, from modern remodels to full home renovations in prestigious Portland neighborhoods such as Laurelhurst, Alameda, and Irvington. The company is known for working seamlessly with architects and designers to create personalized spaces that reflect both new and traditional styles. Joe Mooney is a Certified Aging-in-Place Specialist (CAPS), and his commitment to eco-friendly building practices further enhances the company’s reputation for quality and care in every project. Mooney Construction and Development’s services range from kitchen and bathroom remodels to full custom home construction, with a strong emphasis on client satisfaction and project management. With decades of experience, a passion for preserving the integrity of older homes, and a focus on craftsmanship, Joe and his team continue to exceed the expectations of homeowners across the Portland area.

The Home Builder Digest team examined data from the Portland Bureau of Development Services, which highlighted Mooney Construction & Development LLC’s work on a $205,000 addition in 2022. The project involved a 168 sf expansion of a single-family home’s kitchen and mud room. In 2016, the company also completed a $164,469 project, which included a 613 sf attached garage, 851 sf of living space, a new bedroom, a full bathroom, and remodeled the kitchen and laundry room.

Erics Quality Building

Address:
4204 Egan St., Gervais, OR 97026

Eric’s Quality Building is a trusted, family-owned general contracting company that has proudly served the Portland, Salem, and surrounding areas for many years. Founded by two brothers who grew up learning the craft from their father, the company continues a multi-generational legacy of excellence in construction and rebuilding. From an early age, the brothers honed their skills in a hands-on environment, balancing school and play with practical work, which laid the foundation for their successful venture. Specializing in residential general contracting, homebuilding, composite, cedar, and vinyl decks, as well as excavation and retaining wall projects, Eric’s Quality Building brings unmatched expertise to every job. The company’s diverse portfolio includes both large and small projects, ranging from outbuilding construction to intricate block retaining walls, demonstrating their capacity to handle a wide array of tasks. Their commitment to quality craftsmanship and customer satisfaction has earned them a stellar reputation throughout the region. With decades of combined experience, Eric’s Quality Building continues to uphold the values of dedication and trust that have been passed down through generations. Whether a small-scale renovation or a large custom home build, the brothers’ company remains a reliable and skilled partner for homeowners in need of construction services.

According to data from the Portland Bureau of Development Services, Erics Quality Building worked on two notable projects in 2023. The first, a $58,200 addition, involved expanding the house by 18×32 feet. The second was a $12,166 project, adding an 18’4 x 20 patio cover to the property. This information was compiled by the Home Builder Digest team.

Reliable Contractor LLC

Address:
2291 SE. Cesar Estrada Chavez Blvd., Portland, OR 97214

Reliable Contractor LLC, founded in 1997 by Thomas Thanh Nguyen, has built a strong reputation for delivering high-quality construction services. With decades of experience, the company has earned the trust of clients through its commitment to reliability, professionalism, and attention to detail. Specializing in a wide range of residential and commercial projects, Reliable Contractor LLC continues to provide exceptional craftsmanship and customer satisfaction to every project it undertakes.

The Home Builder Digest team, using data from the Portland Bureau of Development Services, found that in 2021, Reliable Contractor LLC completed a $35,000 project. This included a 354 sq ft addition to a dining room, bedroom, and bathroom, as well as the enclosure of a 50 sq ft covered porch. In 2022, the company also worked on adding 212 sq ft to a garage and 25 sq ft to the covered porch.

Ostmo Construction Inc

Address:
1750 SW. Skyline Blvd., Portland, OR 97221

Ostmo Construction, with over 20 years of experience in the custom home and remodeling industry, has established itself as a trusted leader in residential construction. Originally based in Portland, Oregon, the company has expanded its expertise to the Palm Desert area in California, offering high-end remodels, custom home builds, additions, and outdoor entertainment spaces. Known for their commitment to quality, Ostmo Construction works with a team of experienced employees and skilled subcontractors who share a dedication to professionalism and craftsmanship. From the initial groundbreaking to the finishing touches, the company strives to make the construction process as enjoyable and stress-free as possible for every client. With a focus on understanding each client’s unique needs and goals, Ostmo Construction takes pride in providing personalized service throughout the entire journey. Over the years, the company has completed hundreds of successful projects, earning a reputation for building long-lasting personal relationships and delivering outstanding results. Every project, no matter the size, receives meticulous attention to detail and the company’s unwavering commitment to customer satisfaction. Ostmo Construction is passionate about helping clients turn their ideas into reality, ensuring every decision aligns with their budget, timeline, and vision. With a deep understanding that no two builds are alike, the company brings accountability and professionalism to each project, ensuring that each home reflects the quality and craftsmanship that clients expect.

According to data from the Portland Bureau of Development Services, Ostmo Construction Inc. completed a $75,000 residential addition-alteration project in 2024. The Home Builder Digest team also found that in 2014, the company worked on a $750,000 project, which included both a kitchen remodel and a kids’ bedroom addition.

Pac Restoration Services Inc

Address:
275 S. Beavercreek Rd., Oregon City, OR 97045

Pac Restoration Services Inc., founded in 2011 and led by President Bret Sayre, has been providing expert restoration and repair services for over a decade. Specializing in a wide range of restoration solutions, the company is known for its dedication to quality, reliability, and customer satisfaction. With years of experience, Pac Restoration Services Inc. has built a strong reputation for delivering efficient and professional results, ensuring each project is completed to the highest standards.

In 2021, Pac Restoration Services Inc. undertook a $375,000 addition, expanding the second level by 198 sq ft for a new bedroom. The Home Builder Digest team also found that in 2017, the company worked on a $232,460 project to create habitable space in a basement, which included adding bedrooms, a laundry room, and a bathroom.

Note: The data used to compile this list may not be complete based on the availability of permit data – collecting and consolidating this data is a time-intensive and difficult task. It may not be complete in all areas due to jurisdictional reporting requirements and the availability of data. Job values and permit fees should be taken as estimates rather than exact values, based on the most complete permit and contractor data available. Additionally, number of projects and typical job size may be updated per contractor request.

The time period for the data used for this ranking was the past 365 days, plus an additional 45 days to account for the average timeline of a building permit. If you have any suggestions on the data or see any corrections that you’d like to give feedback on, please fill out this form. For more insights on construction data outside that are not directly related to contractors, there are other resources available as well.